<template>
    <div>
      <!--      面包屑导航-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
      <!--      卡片式图-->
      <el-card>
<!--        提示区域-->
        <el-alert
          title="添加商品信息" type="info" center show-icon :closable="false">
        </el-alert>
<!--        进度条-->
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
<!--        tab栏区域-->
        <el-tabs :tab-position="'left'"  v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                expand_trigger="hover"
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"></el-cascader>
          </el-form-item>

          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
<!--            渲染表单item项-->
            <el-form-item v-for="item in manyTableData" :label="item.attr_name" :key="item.attr_id">
<!--             多选框组-->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox v-for="(cb, i) in item.attr_vals" :label="cb" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <!--            渲染表单item项-->
            <el-form-item v-for="item in onlyTableData" :label="item.attr_name" :key="item.attr_id">
              <!--             多选框组-->
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
            class="upload-demo"
            :action="uploadURL"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            :on-success="handleSuccess"
            list-type="picture"
            :headers="hearderObj">
            <el-button size="small" type="primary">点击上传</el-button>
            <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
          </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
<!--            富文本编辑器-->
            <quill-editor
               ref="myQuillEditor"
               v-model="addForm.goods_introduce"/>
<!--            添加商品按钮-->
            <el-button type="primary" class="addBtn" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
        </el-form>
      </el-card>
      <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%">
        <img :src="previewPath" class="previewImg">
      </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'Add',
  data() {
    return {
      activeIndex: 0,
      // 添加表单的数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片数组
        pics: [],
        // 商品描述
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, trigger: 'blur', message: '请输入商品名称' }
        ],
        goods_price: [
          { required: true, trigger: 'blur', message: '请输入商品价格' }
        ],
        goods_weight: [
          { required: true, trigger: 'blur', message: '请输入商品重量' }
        ],
        goods_number: [
          { required: true, trigger: 'blur', message: '请输入商品数量' }
        ],
        goods_cat: [
          { required: true, trigger: 'blur', message: '请选择商品分类' }
        ]
      },
      // 商品分类列表
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态参数列表数据
      onlyTableData: [],
      // 上传的地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传的请求头(token)
      hearderObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片的真实路径
      previewPath: '',
      previewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败！')
      }
      this.cateList = res.data
      this.total = res.data.total
    },
    // 级联选择器变化触发函数
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类！')
        return false
      }
    },
    async tabClicked() {
      // 证明访问动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态参数列表失败')
        }
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理图片删除操作
    handleRemove(file) {
      // 获取删除图片的临时路径
      const filrPath = file.response.data.tmp_path
      // 从pic数组中找到图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filrPath)
      // 调用数组的splice方法，把图片信息对象，从pics数组中删除
      this.addForm.pics.splice(i, 1)
      // console.log(this.addForm.pics)
    },
    // 监听图片上传成功后的事件
    handleSuccess(response) {
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        // 执行添加选项
        // 先进行深拷贝采用 lodash cloneDeep()方法
        const form = _.cloneDeep(this.addForm)
        // 将goods_cat数组分割为字符串
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数和静态属性
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form)
        // 发起请求添加商品   商品名称必须唯一
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败失败')
        }
        this.$message.success('添加商品成功')
        await this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
  .el-form-item{
    text-align: left;
  }
  .el-checkbox{
    margin: 0 5px 0 0!important;
  }
  .previewImg{
    width: 500px;
  }
  .addBtn{
    float: left;
    margin-top: 15px;
  }
</style>
